FGO: the Heroic Spirits I Have Become Will Have Eternal Infamy.

A time traveler who created many villain stories in the history of Xingyue. I, the time traveler, have multiple avatars in history, following the story of a certain Gouda from Chaldea and other heroic spirits saving humanity. It's just, system, why do all the heroic spirits I become have a reputation for eternity! If you don't like it, don't comment. Any similarity is purely coincidental. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.